Nitrogen and phosphorus uptake from Tithonia diversifolia (Hemsley) A. Gray and inorganic fertiliser and their effect on maize yield (Zea mays) (L.) in Malawi
1999
Ganunga, R.P. (Chitedze Agricultural Research Station, Lilongwe (Malawi)) | Yerokun, O. (University of Zambia, Lusaka (Zambia)) | Kumwenda, J.D.T. (Chitedze Agricultural Research Station, Lilongwe (Malawi))
In trying to assess alternative sources of fertiliser, a study was conducted onfarm at 3 sites during the 1996/97 season in Malawi to assess the effect of Tithonia diversifolia on nutrient uptake and yield of maize compared to inorganic fertiliser. The following treatments were evaluated in a randomised completely block design experiment with three replicates: (1) No fertilizer, no Tithonia (control), (2) 40 kg P205 ha- 1 + 92 kg N ha-1 (standard recommendation), (3) Tithonia diversifolia at 1.5t ha-1 (44.1 kg N + 3.75 kg P), (4) Tithonia diversifolia at 3.0 t ha-1 (88.2 kg N + 7.5 kg P), (5) Tithonia diversifolia at 4.5 t ha-1 (132.3 kg N + 11.25 kg P), (6) Tithonia diversifolia at 1.5 t ha-1 (44.1 kg N + 3.75 kg P) + 13.5 kg P from TSP, (7) Tithonia diversifolia at 3.0 t ha-1 (88.2 kg N + 7.5 kg P) + 9.7 kg P from TSP and (8) Tithonia diversifolia at 4.5 t ha-1 (132.3 kg N + 11.25 kg P) + 5.95 kg P from TSP. The results on nitrogen and phosphorus uptake by maize and maize grain yields are discussed in the full paper.
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